[Figure 1. Place and Direction From Which Figures 2 to 7 Were Taken and Relative Positions of Flooded Surface, Buried Valley of the Susquehanna, and Underlying Coal Measures and Mine Workings]

Year:	1951
Document Type:	N/A
Issuing Agency:	United States. Bureau of Mines.
SUDOC:	I 28.3:508
Series:	United States Bureau of Mines Reports
Report Number:	Bulletin 508
Subject:	Mine drainage
Link:	https://digital.library.unt.edu/ark:/67531/metadc1855806/